| 摘要 |
PURPOSE:To inkate fresh cooling air by forming suction holes of cooling air passages of a clutch and a brake on the outer periphery of a P engineering plastic cover and a vent suction passage in a recess of the cover and P engineering plastic. CONSTITUTION:3 recesses 29 are formed on the end faces of the output shaft 12 side of P engineering plastic 9, and a boss 41 of the plastic cover 31 and a pawl 42 are engaged with the boss 30 of the plastic 9 and the outer peripheral hole 40 of plastic 9. The cover 31 is formed with a suction hole 33 corresponding to the position of the cover 31 and the recess 29 of the plastic 9, and a filter 43 is secured. Air intaken from the hole 33 of the cover 31 is accelerated by a clutch fan 23 through a filter 43 and a vent passage 32 to air windows formed at a brake ring 17 and a clutch ring 16, thereby forming a vent passage for exhausting to the windows formed at the outer periphery of the plastic 9. |
